I just finished the upgrade mod to the MS3 stock mount. I'd say there are zero drawbacks to this mod, and the improvements are well worth the price. I was concerned that it would increase vibrations at idle, but I feel no difference. The throttle and clutch are much more mechanically involving now than with the mushy stock mount.
Mk3 |╠╬╝|SGM|203a|Moonroof|17" Paint/Mach Whls|K&N 57S-4000 -snorkel|FFE RMM|Steeda STB, RSB|JBR bushings
Mk1|╠╬╝|Pitch Blk|Prem pkg|Moonroof|SVT Snorkel|SVT Susp|Steeda STS|Z-Eng RMM|Magnaflow exh